Tearing structure of tear strip, manufacturing device and manufacturing method of tearing structure

ABSTRACT

The present invention discloses a tearing structure of a tear strip and its manufacturing device and manufacturing method. During the process of manufacturing the bag, the bow defined by the pull-up portion is relatively flat. It does not upwarp or interfere with other devices, causing equipment damage or bag waste. The junctions of the pull-up portion are formed by the unevenness of the cutter, which can be used as anti-counterfeiting and anti-theft function. It is judged whether the pull-up portion is opened by the connection of the dotted line of the bow. The inverted buckled structure is formed at a bottom of the bag body and the organ surface is not opened, which is more favorable for sucker grabbing. The second cutter has a square serrated incision to avoid the entire cut-through, thereby solving the problem that the fall off between the pull-up portion and the tear strip caused by overcut in the past.

CROSS REFERENCE OF RELATED APPLICATION

This is a U.S. National Stage under 35 U.S.C 371 of the International Application PCT/CN2018/078285, filed Mar. 7, 2018, which claims priority under 35 U.S.C. 119(a-d) to CN 201810141954.2, filed Feb. 11, 2018.

BACKGROUND OF THE PRESENT INVENTION Field of Invention

The present invention relates to a tear structure of a bag, and more particularly to a tearing structure of a tear strip, a manufacturing device and a manufacturing method of the tearing structure.

Description of Related Arts

The existing bow tearing is a full cutting method. During the production process, the bow is upwarped, and it is easy to tilt while being stacked. It is not easy for the sucking disc to grab, which directly affects the next process, and is easy to form bag waste and equipment damage, as shown in FIG. 9.

SUMMARY OF THE PRESENT INVENTION

An object of the present invention is to provide a tearing structure of a tear strip and its manufacturing device and manufacturing method.

To achieve the above object, the present invention adopts the technical solution as follows. A tear strip, which is installed within an upper film of a bag body, comprises a guide strip and an installation part. A tearing structure, which is located at an end portion of the tear strip, comprises a pull-up portion and a connection portion, wherein: the pull-up portion is formed by longitudinally cutting through a cutting apparatus, the pull-up portion has an edge, there are multiple junctions on the edge are not cut, so that when a force is applied to pull up the pull-up portion, the connection portion is longitudinally cut through the cutting apparatus to remain the upper film of the bag body and the guide strip.

Further, the edge is butterfly-shaped or C-shaped.

Further, there are 2 to 4 junctions on the edge.

A device for manufacturing the tearing structure of the tear strip comprises a cutting apparatus, wherein: the cutting apparatus comprises an upper cutting part and a lower cutting part; a first cutter is located at a lower end of the upper cutting part and is fitted with the edge of the pull-up portion in shape; the first cutter comprises a convex portion and a concave portion; the convex portion defines the edge and the concave portion defines the junctions through cutting; a second cutter is located at an upper end of the lower cutting part and is fitted with the connection portion in shape.

Further, a pad is located under the lower cutting part and is made from SiO₂.nH₂O.

Further, the second cutter has a square serrated incision to avoid an entire cut-through, thereby solving fall off between the pull-up portion and the tear strip caused by overcut in the past.

A method for manufacturing a tear strip of an organ bag through the device mentioned above comprises steps of: installing a guide strip and an installation part of the tear strip within an upper film of a bag body, placing the bag body between an upper cutting part and a lower cutting part of the cutting apparatus, performing cut-through on an edge of a pull-up portion, wherein the upper film, the guide strip, the installation part, an organ side and a lower film are cut through in sequence, forming an inverted buckled structure at a back of the lower film, remaining the upper film and the guide strip at the connection portion, and cutting off the installation part, the organ side and the lower film. The inverted buckled structure is formed based on a principle as follows. When the upper cutting part cuts downwardly to contact with the lower cutting part, under a certain force of the upper cutting part, the lower cutting part transfers the force to the pad; because the pad is relatively soft, the pad is deformed and laterally deviated, and a height between a top end of the first cutter and a horizontal plane is 0.5 mm. When a force of 0.5 Mpa or more is applied, the whole first cutter is inclined by 5°, and the upper film is inserted into a bottom side, so that a bag body inverted buckled structure is formed.

Beneficial effects of the present invention are as follows. During the process of manufacturing the bag, the bow defined by the pull-up portion is relatively flat. It does not upwarp or interfere with other devices, causing equipment damage or bag waste. The junctions of the pull-up portion are formed by the unevenness of the cutter, which can be used as anti-counterfeiting and anti-theft function. It is judged whether the pull-up portion is opened by the connection of the dotted line of the bow. The inverted buckled structure is formed at a bottom of the bag body and the organ surface is not opened, which is more favorable for sucker grabbing. The second cutter has a square serrated incision to avoid the entire cut-through, thereby solving the problem that the fall off between the pull-up portion and the tear strip caused by overcut in the past.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a structurally schematic view of an organ bag.

FIG. 2 is a sectional view along A-A direction in FIG. 1.

FIG. 3 is a structurally schematic view of a pull-up portion.

FIG. 4 is a structurally perspective view of a device for manufacturing a tearing structure of a tear strip.

FIG. 5 is a structurally sectional view of the device for manufacturing the tearing structure of the tear strip.

FIG. 6 is a partially enlarged drawing of the tearing structure of the tear strip.

FIG. 7 is a partially enlarged drawing of an existing tearing structure of a tear strip.

FIG. 8 is a diagram showing the state of grasping during the production process of the bag to body of the present invention.

FIG. 9 is a diagram showing the state of grasping during the production process of the bag body of prior art.

FIG. 10 is a structurally schematic view of the tearing structure of the tear strip when the organ face is opened.

FIG. 11 is a structurally schematic view of an inverted buckled structure.

FIG. 12 is a schematic view of an incision of a second cutter.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

The present invention will be further described in detail with accompanying drawings and embodiments as follows.

Referring to FIGS. 1 to 3 of the drawings, a tearing structure of a tear strip according to a preferred embodiment of the present invention is illustrated. A tear strip, which is installed within an upper film of a bag body, comprises a guide strip 111 and an installation part 121. A tearing structure, which is located at an end portion of the tear strip, comprises a pull-up portion 211 and a connection portion 231, wherein: the pull-up portion 211 is formed by longitudinally cutting through a cutting apparatus, the pull-up portion 211 has a butterfly-shaped edge 2111, there are three junctions 2112 on the butterfly-shaped edge 2111 are not cut, so that when a force is applied to pull up the pull-up portion 211, the connection portion 231 is longitudinally cut through the cutting to apparatus to remain the upper film 131 of the bag body and the guide strip 111.

A device for manufacturing the tearing structure of the tear strip is illustrated, as shown in FIGS. 4 and 5, which comprises the cutting apparatus, wherein: the cutting apparatus comprises an upper cutting part 1 and a lower cutting part 2, wherein a first cutter 311 is located at a lower end of the upper cutting part 1 and is fitted with the butterfly-shaped edge 2111 of the pull-up portion 211 in shape; the first cutter 311 comprises a convex portion 3111 and a concave portion 3112; the convex portion 3111 defines the butterfly-shaped edge 2111 and the concave portion 3112 defines the junctions 2112 through cutting; a second cutter 511 is located at an upper end of the lower cutting part 2 and is fitted with the connection portion 231 in shape; a pad 3 is located under the lower cutting part 2 and is made from SiO₂.nH₂O; the second cutter 511 has a square serrated incision to avoid the entire cut-through, thereby solving the problem that the fall off between the butterfly-shaped edge and the tear strip caused by overcut in the past.

A method for manufacturing a tear strip of an organ bag through the device mentioned above comprises steps of: installing a guide strip and an installation part of the tear strip within an upper film of a bag body, placing the bag body between an upper cutting part and a lower cutting part of the cutting apparatus, performing cut-through on an edge of a pull-up portion, wherein the upper film, the guide strip, the installation part, an organ side and a lower film are cut through in sequence, forming an inverted buckled structure at a back of the lower film, remaining the upper film and the guide strip at the connection portion, and cutting off the installation part, the organ side and the lower film. The inverted buckled structure is formed based on a principle as follows. When the upper cutting part 1 cuts downwardly to contact with the lower cutting part 2, under a certain force of the upper cutting part 1, the lower cutting part 2 transfers the force to the pad; because the pad is relatively soft, the pad is deformed and laterally deviated, and a height h between a top end of 1-1 the first cutter and a horizontal plane is 0.5 mm. When a force of 0.5 Mpa or more is applied, the whole first cutter is inclined by 5°, and the upper film is inserted into a bottom side of the bag body, so that a bag body inverted buckled structure 125 is formed.

Advantages of the bag provided by the present invention are as follows. During the process of manufacturing the bag, a bow defined by the pull-up portion having the butterfly-shaped edge is relatively flat, as shown in FIGS. 6 and 8. It does not upwarp or interfere with other devices, causing equipment damage or bag waste. The junctions of the pull-up portion are formed by the unevenness of the cutter, which can be used as anti-counterfeiting and anti-theft function. It is judged whether the pull-up portion is opened by the connection of the dotted line of the bow. The inverted buckled structure is formed at a bottom of the bag body, and the organ surface is not opened, which is more favorable for sucker grabbing, as shown in FIGS. 10 and 11. The second cutter has a square serrated incision to avoid the entire cut-through, thereby solving the problem that the fall off between the bow and the tear strip caused by overcut in the past.

The above is only a preferred embodiment of the present invention, but the protective scope of the present invention is not limited thereto, and any equivalents or modifications of the technical solutions and the concepts thereof, made by those skilled in the art, according to the technical scope of the present invention should be included in the protective scope of the present invention. 

1. A tearing structure of a tear strip, wherein: the tear strip, which is installed within an upper film of a bag body, comprises a guide strip, an installation part and the tearing structure; the tearing structure comprises a pull-up portion and a connection portion, wherein: the pull-up portion is formed by longitudinally cutting through a cutting apparatus, the pull-up portion has an edge, there are multiple junctions on the edge are not cut, so that when a force is applied to pull up the pull-up portion, the connection portion is longitudinally cut through the cutting apparatus to remain the upper film of the bag body and the guide strip.
 2. The tearing structure of the tear strip, as recited in claim 1, wherein: the edge is butterfly-shaped or C-shaped.
 3. The tearing structure of the tear strip, as recited in claim 1, wherein: there are 2 to 4 junctions on the edge.
 4. A device for manufacturing the tearing structure of the tear strip as recited claim 1, which comprises a cutting apparatus, wherein: the cutting apparatus comprises an upper cutting part and a lower cutting part; a first cutter is located at a lower end of the upper cutting part and is fitted with the edge of the pull-up portion in shape; the first cutter comprises a convex portion and a concave portion; the convex portion defines the edge and the concave portion defines the junctions through cutting; a second cutter is located at an upper end of the lower cutting part and is fitted with the connection portion in shape.
 5. The device for manufacturing the tearing structure of the tear strip, as recited in claim 4, wherein: a pad is located under the lower cutting part and is made from SiO₂.nH₂O.
 6. The device for manufacturing the tearing structure of the tear strip, as recited in claim 4, wherein: the second cutter has a square serrated incision to avoid an entire cut-through.
 7. A method for manufacturing a tear strip of an organ bag through the device as recited in claim 4, which comprises steps of: installing a guide strip and an installation part of the tear strip within an upper film of a bag body, placing the bag body between an upper cutting part and a lower cutting part of the cutting apparatus, performing cut-through on an edge of a pull-up portion, wherein the upper film, the guide strip, the installation part, an organ side and a lower film are cut through in sequence, forming an inverted buckled structure at a back of the lower film, remaining the upper film and the guide strip at the connection portion, and cutting off the installation part, the organ side and the lower film. 